<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<script>
addEventListener("DOMContentLoaded", () => {
  [d1, d2] = document.getElementsByTagName("div");
  [s1, s2] = document.getElementsByTagName("span")
  d3 = document.createElement("div")
  d4 = document.createElement("div")
  d4.setAttribute("class", "grid")
  d3.appendChild(d4)
  d1.appendChild(document.createElement("span"))
  setTimeout(() => {
    d2.removeChild(s2)
    setTimeout(() => {
      d2.insertBefore(d3, s1)
    }, 100)
  }, 100)
})
</script>
<style>
.columns {
  columns: 3;
}
.grid {
  display: grid;
  border:5px solid;
  counter-reset: item;
}
span { display:contents; }
span::before { content: counter(item) ":before"; }
span::after { content: counter(item) ":after"; }
</style>
</head>
<body>
<div class=columns>
<div class=grid>
<c></c>
<span><c></c></span>
<span><c></c></span>
</div>
</div>
</body>
</html>
